CN205792227U - A kind of vehicle electronic device power supply circuits - Google Patents
A kind of vehicle electronic device power supply circuits Download PDFInfo
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- CN205792227U CN205792227U CN201620564910.7U CN201620564910U CN205792227U CN 205792227 U CN205792227 U CN 205792227U CN 201620564910 U CN201620564910 U CN 201620564910U CN 205792227 U CN205792227 U CN 205792227U
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- storage capacitor
- power supply
- electronic device
- vehicle electronic
- supply circuits
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Abstract
The utility model discloses a kind of vehicle electronic device power supply circuits, including the electric fuse being electrically connected with, transient state suppression diode, EMI Filtering unit, the first storage capacitor and DC converter unit, also include: delay startup energy-storage units；Described delay startup energy-storage units is in parallel with the outfan of EMI Filtering unit, and described delay startup energy-storage units and the first storage capacitor are in parallel, for receiving the electric energy of the outfan output of EMI Filtering unit and storing.By increasing delay startup energy-storage units to power supply circuits, make the electric power system of vehicle electronic device under the interference of pulse 1 and pulse 2b, maintain the power supply of power down time section, the power down that can extend electric power system is held time, improve anti-interference and the stability of electric power system, meet the CLASS A testing standard of EMI test.
Description
Technical field
This utility model relates to electrical automotive circuits technical field, particularly relates to a kind of vehicle electronic device power supply circuits.
Background technology
The power supply of vehicle electronic device is battery or electromotor, owing to being affected by temperature, operating mode and other condition, and electricity
The output voltage of pond or electromotor is the most unstable.Additionally, some electronic equipments may be by ESD (Electro-on automobile
Static Discharge, Electro-static Driven Comb), spike noise and transient surge voltage be incorporated in power line.
Fig. 1 is the schematic diagram of vehicle electronic device power supply circuits in prior art.As shown in Figure 1: the power supply of prior art
Circuit generally comprise electric fuse F1, transient state suppression diode D1, EMI Filtering unit, the first storage capacitor E1 and direct current-
DC converting unit (is also called DC/DC converter unit).Due to the restriction of hot plug, the first storage capacitor E1 in prior art
Value can not be very big, generally 100 μ F or 220 μ F.
5 quasi-representative pulses generation principles defined in international standard ISO7637-2, wherein, pulse 1 is used for simulating parallel connection
Inductive load produced glitch when power is off, as turn off the light or electric horn etc. operates；Pulse 2b simulation igniting is cut off
Moment, dc motor becomes generator operation, and thus produced transient phenomena, belongs to low speed and high-octane pulse is done
Disturb.Fig. 2 is the electric power system vulnerability to jamming test curve to pulse 1 of prior art.As in figure 2 it is shown, under the interference of pulse 1,
Electric power system there will be power down time (the i.e. t in Fig. 2 of 200mS2Shown in), the capacitance being because storage capacitor E1 is not enough to dimension
Hold the normal work in this 200mS of the DC/DC converter unit.
So prior art typically can only meet the CLASS C testing standard of EMI test, i.e. equipment or system is being exposed to
During interference, do not perform its one or more function being pre-designed, but can automatically recover after removal directly exposes interference
To normal operating state.In the contour reliability application of vehicle power control system, sometimes require that by CLASS A testing standard,
I.e. equipment or system are during and after being exposed to interference, can perform its all functions being pre-designed；Obviously prior art is not
The class requirement of CLASS A can be met.
Utility model content
The purpose of this utility model is to propose a kind of vehicle electronic device power supply circuits, it is possible to increase vehicle electronic device
The anti-interference of electric power system and stability.
For reaching this purpose, this utility model by the following technical solutions:
A kind of vehicle electronic device power supply circuits, including the electric fuse being electrically connected with, transient state suppression diode, electromagnetic interference
Filter unit, the first storage capacitor and DC-dc conversion unit, also include: delay startup energy-storage units；
Described delay startup energy-storage units is in parallel with the outfan of EMI Filtering unit, and described delay startup energy-storage units
In parallel with the first storage capacitor, for receiving the electric energy of the outfan output of EMI Filtering unit and storing.
Wherein, described delay startup energy-storage units includes: reverse-connection preventing circuit, delay startup module and the second storage capacitor；
Described reverse-connection preventing circuit is for realizing the unilateal conduction of described vehicle electronic device power supply circuits；
Described delay startup module is carried in the dash current at the second storage capacitor two ends for reducing powered on moment；
Described reverse-connection preventing circuit, described delay startup module and described second energy storage capacitor in series, the second storage capacitor and
One storage capacitor is in parallel, so that the capacitance of the second storage capacitor and the first storage capacitor is superimposed.
Preferably, described reverse-connection preventing circuit is one-way conduction diode.
Further, in such scheme, described delay startup module includes: preliminary filling resistance and switch, described preliminary filling resistance with
Described switch in parallel.
Further, in described vehicle electronic device power supply circuits, the positive pole of one-way conduction diode is filtered with electromagnetic interference
The cathode output end of ripple unit connects；One end of preliminary filling resistance respectively with negative pole and first storage capacitor of one-way conduction diode
Positive pole connect, the connection of the positive pole of the other end and the second storage capacitor；One end of described switch respectively with one-way conduction diode
Negative pole and the positive pole of the first storage capacitor connect, the connection of the positive pole of the other end and the second storage capacitor；Second storage capacitor
Negative pole is connected with the cathode output end of EMI Filtering unit and the negative pole of the first storage capacitor respectively.
Preferably, the capacitance of described second storage capacitor is 1000 more than μ F.
Preferably, described one-way conduction diode is Schottky diode.
Preferably, the resistance of described preliminary filling resistance is 10K Ω.
Preferably, described switch is normal open switch.
Preferably, described switch is photoelectric relay or field effect transistor.
The beneficial effects of the utility model are:
By increasing delay startup energy-storage units to power supply circuits, increase the deposit capacitance of electric power system, make vehicle mounted electric
The electric power system of subset is under the interference of pulse 1 and pulse 2b, it is possible to maintain the power supply of power down time section, extends electric power system
Power down hold time, improve the anti-interference of electric power system and stability, meet the CLASS A testing standard of EMI test.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of vehicle electronic device power supply circuits in prior art.
Fig. 2 is the electric power system vulnerability to jamming test curve to pulse 1 of prior art.
Fig. 3 is the schematic diagram of vehicle electronic device power supply circuits in embodiment of the present utility model.
Detailed description of the invention
For making this utility model solve the technical problem that, the technical scheme that uses and the technique effect reached clearer,
Below in conjunction with accompanying drawing, the technical scheme of this utility model embodiment is described in further detail, it is clear that described reality
Executing example is only a part of embodiment of this utility model rather than whole embodiments.
The present embodiment provides a kind of vehicle electronic device power supply circuits, for providing energy for vehicle electronic device, possesses
The advantages such as anti-interference and stability are strong.
Fig. 3 is the schematic diagram of vehicle electronic device power supply circuits in embodiment of the present utility model.As it is shown on figure 3, this reality
Executing example on the basis of existing technology, add delay startup energy-storage units 10 to electric power system, described vehicle electronic device is powered
Circuit, including the electric fuse being electrically connected with, transient state suppression diode, EMI Filtering unit, the first storage capacitor E1 and straight
Stream-DC converting unit, also includes: delay startup energy-storage units 10.
Described delay startup energy-storage units 10 is in parallel with the outfan of EMI Filtering unit, and described delay startup energy storage list
Unit is in parallel with the first storage capacitor E1, for receiving the electric energy of the outfan output of EMI Filtering unit and storing, increases
The deposit capacitance of electric power system.In the present embodiment, as one preferred embodiment, described delay startup energy-storage units 10 wraps
Include: reverse-connection preventing circuit, delay startup module 101 and the second storage capacitor E2.Described reverse-connection preventing circuit is used for realizing described vehicle mounted electric
The unilateal conduction of subset power supply circuits；Described delay startup module 101 is used for reducing powered on moment and is carried in the second storage capacitor
The dash current at E2 two ends；Described reverse-connection preventing circuit, described delay startup module 101 and described second storage capacitor E2 series connection, the
Two storage capacitor E2 and the first storage capacitor E1 are in parallel, so that the second storage capacitor E2 and the capacitance phase of the first storage capacitor E1
Superposition.
In the present embodiment, described reverse-connection preventing circuit is one-way conduction diode D2, in other embodiments, it is also possible to be it
He has the circuit of one-way conduction effect, is used for avoiding error-polarity connection of power supply to damage electric power system, and prevents electric power system from falling
During electricity, energy pours in down a chimney.Preferably, described one-way conduction diode D2 is Schottky diode.
As one preferred embodiment, the capacitance of described second storage capacitor E2 is 1000 more than μ F, the second storage
Energy electric capacity E2 and the first storage capacitor E1 is in parallel, can make the capacitance superposition of the two, in electric power system power down time
Energy is provided, maintains the normal work of DC-dc conversion unit, compensate in prior art the first storage capacitor E1 value not
Defect that can be the biggest.
But, if only increasing by the second storage capacitor E2, then can be because of the second storage capacitor E2 powered on moment impact electric current mistake
Damage electric power system device greatly, it is therefore desirable to described delay startup module 101 assists.
Described delay startup module 101 includes preliminary filling resistance R1 and switch K1, described preliminary filling resistance R1 with described switch K1 also
Connection, for realizing the delay startup process of delay startup energy-storage units 10, when i.e. switch K1 disconnects, preliminary filling resistance R1 shares part electricity
Pressure, the second storage capacitor E2 the most slowly charging, after switch K1 Guan Bi, the second storage capacitor E2 quick charge.Described preliminary filling resistance
R1 can take bigger resistance, takes resistance 10K Ω in the present embodiment.Described switch K1 is normal open switch, normal open switch ordinary circumstance
It is off-state down, closes after receiving energizing signal, such as photoelectric relay or field effect transistor, preferably PMOS.Described
Delay startup module 101 can avoid input power VIN powered on moment, due to the existence of jumbo second storage capacitor E2, causes
Dash current is excessive and damages electric power system device.
The annexation of the described each components and parts of vehicle electronic device power supply circuits is as it is shown on figure 3, one-way conduction diode D2
Positive pole be connected with the cathode output end of EMI Filtering unit；One end of preliminary filling resistance R1 respectively with one-way conduction diode
The negative pole of D2 and the positive pole of the first storage capacitor E1 connect, and the positive pole of the other end and the second storage capacitor E2 connects；Described switch
One end of K1 is connected with the negative pole of one-way conduction diode D2 and the positive pole of the first storage capacitor E1 respectively, the other end and the second storage
The positive pole of energy electric capacity E2 connects；The negative pole of the second storage capacitor E2 respectively with the cathode output end and of EMI Filtering unit
The negative pole of one storage capacitor E1 connects.
Described vehicle electronic device power supply circuits work process is as follows:
1, powering on as input power VIN, energy arrives delay startup energy-storage units 10.Switch K1 under original state to disconnect, defeated
Enter power supply VIN by one-way conduction diode D2, preliminary filling resistance R1, the first storage capacitor E1 to be charged, and to the second energy storage
Electric capacity E2 slowly charges (i.e. pre-charge process)；It is simultaneously entered power supply VIN input to be exported to DC/DC converter unit
Voltage VOUT, output voltage VO UT supplies electricity to micro-control unit, and micro-control unit is started working.
2, export control signal after micro-control unit time delay certain time and control switch K1 Guan Bi, complete delay startup process；
Input power VIN by one-way conduction diode D2, switch K1 to the second storage capacitor E2 quick charge, until second energy storage electricity
Hold E2 to be full of.
3, being interfered power down as input power VIN, the second storage capacitor E2 is by switch K1 and the first storage capacitor E1
Together, power for DC/DC converter unit.
Due to the existence of Large Copacity storage capacitor, can effectively maintain the energy supply of power down time, improve power supply system
The anti-interference of system and stability, meet the vulnerability to jamming test request of pulse 1 and pulse 2b, reaches the CLASS A etc. of EMI test
Grade standard.Meanwhile, the delay startup module of increase can avoid input power powered on moment, due to depositing of jumbo storage capacitor
, cause dash current excessive and damage electric power system device.
Know-why of the present utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality
By novel principle, and the restriction to this utility model protection domain can not be construed to by any way.Based on explanation herein,
Those skilled in the art need not pay performing creative labour can associate other detailed description of the invention of the present utility model,
Within these modes fall within protection domain of the present utility model.
Claims (10)
1. vehicle electronic device power supply circuits, including the electric fuse being electrically connected with, transient state suppression diode, electromagnetic interference filter
Ripple unit, the first storage capacitor and DC-dc conversion unit, it is characterised in that also include: delay startup energy-storage units；
Described delay startup energy-storage units is in parallel with the outfan of EMI Filtering unit, and described delay startup energy-storage units and
One storage capacitor is in parallel, for receiving the electric energy of the outfan output of EMI Filtering unit and storing.
Vehicle electronic device power supply circuits the most according to claim 1, it is characterised in that described delay startup energy-storage units bag
Include: reverse-connection preventing circuit, delay startup module and the second storage capacitor；
Described reverse-connection preventing circuit is for realizing the unilateal conduction of described vehicle electronic device power supply circuits；
Described delay startup module is carried in the dash current at the second storage capacitor two ends for reducing powered on moment；
Described reverse-connection preventing circuit, described delay startup module and described second energy storage capacitor in series, the second storage capacitor and the first storage
Energy electric capacity is in parallel, so that the capacitance of the second storage capacitor and the first storage capacitor is superimposed.
Vehicle electronic device power supply circuits the most according to claim 2, it is characterised in that described reverse-connection preventing circuit is unidirectional
Conducting diode.
Vehicle electronic device power supply circuits the most according to claim 3, it is characterised in that described delay startup module includes:
Preliminary filling resistance and switch, described preliminary filling resistance and described switch in parallel.
Vehicle electronic device power supply circuits the most according to claim 4, it is characterised in that: the positive pole of one-way conduction diode
It is connected with the cathode output end of EMI Filtering unit；One end of preliminary filling resistance respectively with the negative pole of one-way conduction diode and
The positive pole of the first storage capacitor connects, and the positive pole of the other end and the second storage capacitor connects；One end of described switch respectively with list
Connecting to the negative pole of conducting diode and the positive pole of the first storage capacitor, the positive pole of the other end and the second storage capacitor connects；The
The negative pole of two storage capacitors is connected with the cathode output end of EMI Filtering unit and the negative pole of the first storage capacitor respectively.
6. according to the vehicle electronic device power supply circuits described in any one of claim 2 to 5, it is characterised in that: described second storage
The capacitance of energy electric capacity is 1000 more than μ F.
7. according to the vehicle electronic device power supply circuits described in any one of claim 3 to 5, it is characterised in that: described unidirectional
Logical diode is Schottky diode.
8. according to the vehicle electronic device power supply circuits described in claim 4 or 5, it is characterised in that: the resistance of described preliminary filling resistance
Value is 10K Ω.
9. according to the vehicle electronic device power supply circuits described in claim 4 or 5, it is characterised in that: described switch is normally opened opening
Close.
Vehicle electronic device power supply circuits the most according to claim 9, it is characterised in that: described switch is photoelectricity relay
Device or field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620564910.7U CN205792227U (en) | 2016-06-12 | 2016-06-12 | A kind of vehicle electronic device power supply circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620564910.7U CN205792227U (en) | 2016-06-12 | 2016-06-12 | A kind of vehicle electronic device power supply circuits |
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| Publication Number | Publication Date |
|---|---|
| CN205792227U true CN205792227U (en) | 2016-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620564910.7U Expired - Fee Related CN205792227U (en) | 2016-06-12 | 2016-06-12 | A kind of vehicle electronic device power supply circuits |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370378A (en) * | 2017-07-12 | 2017-11-21 | 北京航空航天大学 | A kind of high-power high voltage DC-DC converter for trolleybus |
| CN109617035A (en) * | 2019-01-03 | 2019-04-12 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
| CN114079370A (en) * | 2020-08-17 | 2022-02-22 | 维谛公司 | Output hot plug circuit |
-
2016
- 2016-06-12 CN CN201620564910.7U patent/CN205792227U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370378A (en) * | 2017-07-12 | 2017-11-21 | 北京航空航天大学 | A kind of high-power high voltage DC-DC converter for trolleybus |
| CN109617035A (en) * | 2019-01-03 | 2019-04-12 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
| CN109617035B (en) * | 2019-01-03 | 2019-10-18 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
| CN114079370A (en) * | 2020-08-17 | 2022-02-22 | 维谛公司 | Output hot plug circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20210612 |